https://github.com/pjiwm/functional-rust

A Rust library for functional programming, providing function composition, currying, and higher-order functions. This crate can be compiled on nightly Rust.
https://github.com/pjiwm/functional-rust

crate currying function functional-programming library rust rust-lang

Last synced: about 1 month ago
JSON representation

A Rust library for functional programming, providing function composition, currying, and higher-order functions. This crate can be compiled on nightly Rust.

• Host: GitHub
• URL: https://github.com/pjiwm/functional-rust
• Owner: Pjiwm
• License: mit
• Created: 2024-12-16T00:04:46.000Z (about 1 month ago)
• Default Branch: main
• Last Pushed: 2024-12-16T00:16:35.000Z (about 1 month ago)
• Last Synced: 2024-12-16T01:20:05.293Z (about 1 month ago)
• Topics: crate, currying, function, functional-programming, library, rust, rust-lang
• Language: Rust
• Homepage:
• Size: 4.88 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

        

# functional_rs

`functional_rs` is an experimental crate that brings functional programming concepts to Rust using Nightly features.

By implementing `Fn` on structs, it enables function composition, currying, and other higher-order functional programming patterns.

The goal is to keep the syntax as concise as possible, making functional patterns easy to use without cluttering the code.

This crate is designed for **Nightly Rust** and uses experimental features, so it’s not stable yet.

## Example

```rust

use functional_rs::{c, f, ComposableFn};

use std::str::FromStr;

fn main() {

    let from_str = i32::from_str;

    let parse_or_zero = |result: Result::Err>| result.unwrap_or(0);

    // Currying with composition

    let add = c!(|a: i32, b: i32| a + b);

    let add_10_from_str = f!(from_str) >> f!(parse_or_zero) >> f!(add(10));

    // Using the composed function

    assert_eq!(add_10_from_str("4"), 14); // (4 -> parse -> add 10) = 14

    assert_eq!(add_10_from_str("not a number"), 10); // invalid input -> default 10

}